<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
<style>
    .h{
        background-color: rgb(255, 0, 0);
    }
    .c{
        color: greenyellow;
        word-spacing: 20px;
    }
</style>

    <p class="h">123</p>
    <span class="c"> 一 二一 三</span>

</body>
</html>